Ivy, a truck driver, spent 17 days this spring on a spray crew in Douglas County, the heart of Oregon's timber country.

He got sprayed so often it became routine.

Don't worry about it, Ivy said the pilot told him. It won't hurt you.

Troubled by what he saw, Ivy documented his working conditions day after day. He recently provided hours of time-stamped clips and hundreds of photographs to The Oregonian/OregonLive.

The photos and videos provide damning proof of what can happen deep in Oregon's forests when no one is looking. The scenes could have come from a Hitchcock movie.

They catch a helicopter pilot repeatedly unleashing hazardous chemicals on Ivy and others.

The clips show drivers moving leaky trucks covered in weed killers past homes, campgrounds and rivers. One driver dips a bucket used to measure atrazine, a chemical that easily pollutes water, into a stream.

In another video, Ivy chronicles how he and a co-worker drove chemical trucks high on a narrow logging road, moving atop eroded earth that appears to have freshly slid away. In others, they pump water out of streams without first notifying the necessary state agencies.

Nothing is more worrisome than the number of times the helicopter sprays over workers. Depending on the chemicals used, workers aren't allowed to enter spray sites for up to 48 hours. Directly spraying workers is illegal. It's also illegal to allow chemicals to drift onto workers.

One of the weed killers, Velossa, which is identified in the videos, can cause irreversible eye damage. Another, 2,4-D, causes skin irritation. Breathing even its vapors can cause dizziness.

If such chemicals land on workers' clothes, they're supposed to take them off and wash their skin for 15 minutes. Ivy said he was never told that. He wore the same clothes for three days before realizing that might be the reason his skin felt itchy.

Industry representatives insist that timber companies and their contractors follow the rules. They say they adhere to federally approved instructions for each chemical.

Documentation like Ivy's is rare. Regulators seldom are present during spray operations so there is little independent evidence of what goes on.

An Oregon Department of Forestry monitor was on the site last month at the time the videos show Ivy being sprayed in his truck. An agency spokesman said the observer didn't see any violations but wouldn't answer more specific questions.

State agencies investigate after-the-fact complaints, but those are infrequent. In 2014, the Oregon Department of Agriculture investigated six cases about aerial sprays in forestry.

Oregon environmental groups and citizens cite instance after instance in which spraying operations have gone awry, poisoning people and property. They have pressed state agencies and legislators to more tightly regulate industrial spraying. Their demands have gone nowhere.

Lisa Arkin, executive director of the advocacy group Beyond Toxics, said Ivy's videos as described to her confirm her suspicions about the timber industry's spraying practices.

"I understand better why they fight tooth and nail against any disclosure or monitoring or advanced notification," she said. "Because they wouldn't have the ability to hide this from the public."

The Oregonian/OregonLive shared three videos with Ted Reiss, timberlands manager for Seneca Jones Timber Co. The Eugene firm hired Applebee Aviation, which did the spraying.

Two clips show herbicides being sprayed directly above Ivy's crew. In one, a Seneca forester is nearly sprayed.

Reiss said the forester was not sprayed. The company's observers, Reiss said, "did not observe anything during the applications in question that would substantiate Mr. Ivy's claims, but we take such accusations seriously and are fully cooperating" with two state investigations.

Mike Applebee, owner of Applebee Aviation, declined to comment. The company employed Ivy for the Douglas County project. The pilot, David McDaniel, didn't return telephone messages.

Ivy remains outraged at his experience.

He paused repeatedly during interviews, coughing blood into a stained white towel he now carries everywhere.

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Each year, helicopters spray weed killers on more than 165 square miles of Oregon timberland, an area larger than the city of Portland. They do it under the West Coast's weakest regulations.

The practices are governed by the Agriculture and Forestry departments. They oversee laws that give companies far more discretion to decide how and where to spray than in neighboring states.

Timber companies and helicopter sprayers describe themselves as conscientious stewards of forestlands, following layers of heavy regulation to ensure weed killers are used safely. The chemicals kill and control weeds that sprout after timber is cut, allowing fir seedlings to grow.

An Applebee pilot doused a Hillsboro cyclist with an insecticide in 2010 but was not fined, state records show. The company was found in violation as well, but wasn't fined either.

Last year, state records show, another Applebee pilot allowed weed killers to drift 400 feet into a neighbor's front yard during a Seneca Jones spray operation in Douglas County. Several people complained of being sickened. The pilot and the company were each penalized $407.

The pilot could have gotten a bigger fine for driving 36 mph in a 25 mph zone.

Regulators reacted forcefully to Oregon's highest-profile spray case, a 2013 Curry County incident that produced 20 complaints of illnesses. In that case, an independent pilot repeatedly flew over homes as he moved between two clearcuts, misting people below.

The Agriculture Department suspended that pilot's spraying license for a year and fined him and his business $10,000 each. Nearly a year later, the sanctions are on hold as the pilot, Steve Owen, contests the matter.